CVE-2021-47078 (GCVE-0-2021-47078)
Vulnerability from cvelistv5 – Published: 2024-03-01 21:15 – Updated: 2026-08-05 08:45
VLAI
EPSS
VEX
Title
RDMA/rxe: Clear all QP fields if creation failed
Summary
In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Clear all QP fields if creation failed
rxe_qp_do_cleanup() relies on valid pointer values in QP for the properly
created ones, but in case rxe_qp_from_init() failed it was filled with
garbage and caused tot the following error.
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 12560 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 12560 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28
Code: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55
RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815b4eae R11: 0000000000000000 R12: ffff8880322a4800
R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000
FS: 00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
kref_put include/linux/kref.h:64 [inline]
rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805
execute_in_process_context+0x37/0x150 kernel/workqueue.c:3327
rxe_elem_release+0x9f/0x180 drivers/infiniband/sw/rxe/rxe_pool.c:391
kref_put include/linux/kref.h:65 [inline]
rxe_create_qp+0x2cd/0x310 drivers/infiniband/sw/rxe/rxe_verbs.c:425
_ib_create_qp drivers/infiniband/core/core_priv.h:331 [inline]
ib_create_named_qp+0x2ad/0x1370 drivers/infiniband/core/verbs.c:1231
ib_create_qp include/rdma/ib_verbs.h:3644 [inline]
create_mad_qp+0x177/0x2d0 drivers/infiniband/core/mad.c:2920
ib_mad_port_open drivers/infiniband/core/mad.c:3001 [inline]
ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092
add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:717
enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331
ib_register_device drivers/infiniband/core/device.c:1413 [inline]
ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c:1365
rxe_register_device+0x3d5/0x4a0 drivers/infiniband/sw/rxe/rxe_verbs.c:1147
rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247
rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:503
rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline]
rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250
nldev_newlink+0x30e/0x550 drivers/infiniband/core/nldev.c:1555
rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195
rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259
netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:674
____sys_sendmsg+0x6e8/0x810 net/socket.c:2350
___sys_sendmsg+0xf3/0x170 net/socket.c:2404
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2433
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0
---truncated---
Severity
7.8 (High)
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-06 15:32 UTC
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8700e3e7c4857d28ebaa824509934556da0b3e76 , < c65391dd9f0a47617e96e38bd27e277cbe1c40b0
(git)
Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 6a8086a42dfbf548a42bf2ae4faa291645c72c66 (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < f3783c415bf6d2ead3d7aa2c38802bbe10723646 (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < a62225d951d77eb20208fed8fc199e0c9b1df08b (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 2ee4d79c364914989c80de382c0b1a7259a7e4b3 (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 03344e843ab6dd3b3f2cadfb65ed910590856c70 (git) Affected: 8700e3e7c4857d28ebaa824509934556da0b3e76 , < 67f29896fdc83298eed5a6576ff8f9873f709228 (git) |
guessed | |
| Linux | Linux |
Affected:
4.8
Unaffected: 0 , < 4.8 (semver) Unaffected: 4.9.270 , ≤ 4.9.* (semver) Unaffected: 4.14.234 , ≤ 4.14.* (semver) Unaffected: 4.19.192 , ≤ 4.19.* (semver) Unaffected: 5.4.122 , ≤ 5.4.* (semver) Unaffected: 5.10.40 , ≤ 5.10.* (semver) Unaffected: 5.12.7 , ≤ 5.12.* (semver) Unaffected: 5.13 , ≤ * (original_commit_for_fix) |
guessed |
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Clear all QP fields if creation failed\n\nrxe_qp_do_cleanup() relies on valid pointer values in QP for the properly\ncreated ones, but in case rxe_qp_from_init() failed it was filled with\ngarbage and caused tot the following error.\n\n refcount_t: underflow; use-after-free.\n WARNING: CPU: 1 PID: 12560 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28\n Modules linked in:\n CPU: 1 PID: 12560 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\n RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28\n Code: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 \u003c0f\u003e 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55\n RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000\n RDX: 0000000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67\n RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000\n R10: ffffffff815b4eae R11: 0000000000000000 R12: ffff8880322a4800\n R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000\n FS: 00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n __refcount_sub_and_test include/linux/refcount.h:283 [inline]\n __refcount_dec_and_test include/linux/refcount.h:315 [inline]\n refcount_dec_and_test include/linux/refcount.h:333 [inline]\n kref_put include/linux/kref.h:64 [inline]\n rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805\n execute_in_process_context+0x37/0x150 kernel/workqueue.c:3327\n rxe_elem_release+0x9f/0x180 drivers/infiniband/sw/rxe/rxe_pool.c:391\n kref_put include/linux/kref.h:65 [inline]\n rxe_create_qp+0x2cd/0x310 drivers/infiniband/sw/rxe/rxe_verbs.c:425\n _ib_create_qp drivers/infiniband/core/core_priv.h:331 [inline]\n ib_create_named_qp+0x2ad/0x1370 drivers/infiniband/core/verbs.c:1231\n ib_create_qp include/rdma/ib_verbs.h:3644 [inline]\n create_mad_qp+0x177/0x2d0 drivers/infiniband/core/mad.c:2920\n ib_mad_port_open drivers/infiniband/core/mad.c:3001 [inline]\n ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092\n add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:717\n enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331\n ib_register_device drivers/infiniband/core/device.c:1413 [inline]\n ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c:1365\n rxe_register_device+0x3d5/0x4a0 drivers/infiniband/sw/rxe/rxe_verbs.c:1147\n rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247\n rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:503\n rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline]\n rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250\n nldev_newlink+0x30e/0x550 drivers/infiniband/core/nldev.c:1555\n rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195\n rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]\n rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338\n netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927\n sock_sendmsg_nosec net/socket.c:654 [inline]\n sock_sendmsg+0xcf/0x120 net/socket.c:674\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2404\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433\n do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47\n entry_SYSCALL_64_after_hwframe+0\n---truncated---"
}
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{
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"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is in Soft RoCE QP creation failure cleanup, reached via local uverbs create_qp or RDMA netlink nldev_newlink, not via processing remote packets.\nAC:L - An attacker who can create QPs can reliably force rxe_qp_from_init() to fail (e.g., mmap-info allocation or copy_to_user failure on the userspace path) and hit the broken cleanup; no conditions outside attacker control are required.\nPR:L - Once an rxe device exists, /dev/infiniband/uverbs* is mode 0666 with no capability check for ordinary create_qp, so an unprivileged local user can trigger the same failure/cleanup UAF; creating the link itself needs CAP_NET_ADMIN in init_user_ns, but the vulnerable code is reachable without that.\nUI:N - Exploitation requires only attacker-controlled syscalls (uverbs or netlink); no victim action is needed.\nS:U - Impact is confined to the local kernel privilege boundary (standard local UAF/privilege escalation), with no VM escape or cross-authority boundary crossed.\nC:H - Failed QP init drops PD/CQ/SRQ refs then leaves those pointers set so rxe_qp_do_cleanup() drops them again, producing a refcount underflow use-after-free that can yield arbitrary kernel read primitives.\nI:H - The same UAF/double-free of referenced objects and dangling queue pointers enables heap reuse and arbitrary write / control-flow hijacking in the kernel.\nA:H - The bug demonstrably causes refcount underflow warnings and use-after-free during cleanup, which can oops/panic the kernel even without full exploitation."
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2021-47078",
"datePublished": "2024-03-01T21:15:14.679Z",
"dateReserved": "2024-02-29T22:33:44.297Z",
"dateUpdated": "2026-08-05T08:45:51.708Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-47078",
"date": "2026-09-15",
"epss": "0.00281",
"percentile": "0.2059"
},
"fkie_nvd": {
"descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/rxe: Clear all QP fields if creation failed\\n\\nrxe_qp_do_cleanup() relies on valid pointer values in QP for the properly\\ncreated ones, but in case rxe_qp_from_init() failed it was filled with\\ngarbage and caused tot the following error.\\n\\n refcount_t: underflow; use-after-free.\\n WARNING: CPU: 1 PID: 12560 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28\\n Modules linked in:\\n CPU: 1 PID: 12560 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0\\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\n RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28\\n Code: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 \u003c0f\u003e 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55\\n RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286\\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000\\n RDX: 0000000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67\\n RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000\\n R10: ffffffff815b4eae R11: 0000000000000000 R12: ffff8880322a4800\\n R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000\\n FS: 00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000\\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0\\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n Call Trace:\\n __refcount_sub_and_test include/linux/refcount.h:283 [inline]\\n __refcount_dec_and_test include/linux/refcount.h:315 [inline]\\n refcount_dec_and_test include/linux/refcount.h:333 [inline]\\n kref_put include/linux/kref.h:64 [inline]\\n rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805\\n execute_in_process_context+0x37/0x150 kernel/workqueue.c:3327\\n rxe_elem_release+0x9f/0x180 drivers/infiniband/sw/rxe/rxe_pool.c:391\\n kref_put include/linux/kref.h:65 [inline]\\n rxe_create_qp+0x2cd/0x310 drivers/infiniband/sw/rxe/rxe_verbs.c:425\\n _ib_create_qp drivers/infiniband/core/core_priv.h:331 [inline]\\n ib_create_named_qp+0x2ad/0x1370 drivers/infiniband/core/verbs.c:1231\\n ib_create_qp include/rdma/ib_verbs.h:3644 [inline]\\n create_mad_qp+0x177/0x2d0 drivers/infiniband/core/mad.c:2920\\n ib_mad_port_open drivers/infiniband/core/mad.c:3001 [inline]\\n ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092\\n add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:717\\n enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331\\n ib_register_device drivers/infiniband/core/device.c:1413 [inline]\\n ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c:1365\\n rxe_register_device+0x3d5/0x4a0 drivers/infiniband/sw/rxe/rxe_verbs.c:1147\\n rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247\\n rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:503\\n rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline]\\n rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250\\n nldev_newlink+0x30e/0x550 drivers/infiniband/core/nldev.c:1555\\n rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195\\n rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]\\n rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259\\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338\\n netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927\\n sock_sendmsg_nosec net/socket.c:654 [inline]\\n sock_sendmsg+0xcf/0x120 net/socket.c:674\\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350\\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2404\\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433\\n do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47\\n entry_SYSCALL_64_after_hwframe+0\\n---truncated---\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: RDMA/rxe: borra todos los campos QP si la creaci\\u00f3n falla. rxe_qp_do_cleanup() se basa en valores de puntero v\\u00e1lidos en QP para los creados correctamente, pero en caso de que rxe_qp_from_init() fallara, se llen\\u00f3 con basura y provoc\\u00f3 el siguiente error. refcount_t: desbordamiento insuficiente; Use After Free. ADVERTENCIA: CPU: 1 PID: 12560 en lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28 M\\u00f3dulos vinculados en: CPU: 1 PID: 12560 Comm: syz-executor.4 No contaminado 5.12.0 -syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28 C\\u00f3digo: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 \u0026lt;0f\u0026gt; 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 00000000000000000 RCX: 0000000000000000 RDX: 00 00000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67 RBP: 0000000000000003 R08: 00000000000000000 R09: 00000000000000000 R10: ffffffff815b4eae R 11: 0000000000000000 R12: ffff8880322a4800 R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000 FS: 00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS :0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0 DR0: 0000 000000000000 DR1 : 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas: __refcount_sub_and_test include/linux/refcount.h:283 [ en l\\u00ednea] __refcount_dec_and_test include/linux/refcount.h:315 [en l\\u00ednea] refcount_dec_and_test include/linux/refcount. h:333 [en l\\u00ednea] kref_put include/linux/kref.h:64 [en l\\u00ednea] rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805 ejecutar_in_process_context+0x37/0x150 kernel/workqueue.c:3327 rxe_elem_release +0x9f/0x180 controladores/infiniband/sw/rxe/rxe_pool.c:391 kref_put include/linux/kref.h:65 [en l\\u00ednea] rxe_create_qp+0x2cd/0x310 controladores/infiniband/sw/rxe/rxe_verbs.c:425 controladores _ib_create_qp /infiniband/core/core_priv.h:331 [en l\\u00ednea] ib_create_named_qp+0x2ad/0x1370 controladores/infiniband/core/verbs.c:1231 ib_create_qp include/rdma/ib_verbs.h:3644 [en l\\u00ednea] create_mad_qp+0x177/0x2d0 controladores/infiniband /core/mad.c:2920 ib_mad_port_open drivers/infiniband/core/mad.c:3001 [en l\\u00ednea] ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092 add_client_context+0x405/0x5e0 drivers/infiniband/core/ device.c:717 enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331 ib_register_device drivers/infiniband/core/device.c:1413 [en l\\u00ednea] ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c :1365 rxe_register_device+0x3d5/0x4a0 controladores/infiniband/sw/rxe/rxe_verbs.c:1147 rxe_add+0x12fe/0x16d0 controladores/infiniband/sw/rxe/rxe.c:247 rxe_net_add+0x8c/0xe0 controladores/infiniband/sw/r xe /rxe_net.c:503 controladores rxe_newlink/infiniband/sw/rxe/rxe.c:269 [en l\\u00ednea] controladores rxe_newlink+0xb7/0xe0/infiniband/sw/rxe/rxe.c:250 controladores nldev_newlink+0x30e/0x550/infiniband/ core/nldev.c:1555 rdma_nl_rcv_msg+0x36d/0x690 controladores/infiniband/core/netlink.c:195 rdma_nl_rcv_skb controladores/infiniband/core/netlink.c:239 [en l\\u00ednea] rdma_nl_rcv+0x2ee/0x430 controladores/infiniband/core/netlink .c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [en l\\u00ednea] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket. c:654 [en l\\u00ednea] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b 0 red/toma .c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 Entry_SYSCALL_64_after_hwframe+0 ---truncado---\"}]",
"id": "CVE-2021-47078",
"lastModified": "2024-11-21T06:35:21.327",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"LOW\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.4}]}",
"published": "2024-03-01T22:15:47.333",
"references": "[{\"url\": \"https://git.kernel.org/stable/c/03344e843ab6dd3b3f2cadfb65ed910590856c70\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/2ee4d79c364914989c80de382c0b1a7259a7e4b3\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/67f29896fdc83298eed5a6576ff8f9873f709228\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/6a8086a42dfbf548a42bf2ae4faa291645c72c66\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/a62225d951d77eb20208fed8fc199e0c9b1df08b\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/c65391dd9f0a47617e96e38bd27e277cbe1c40b0\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/f3783c415bf6d2ead3d7aa2c38802bbe10723646\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/03344e843ab6dd3b3f2cadfb65ed910590856c70\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/2ee4d79c364914989c80de382c0b1a7259a7e4b3\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/67f29896fdc83298eed5a6576ff8f9873f709228\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/6a8086a42dfbf548a42bf2ae4faa291645c72c66\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/a62225d951d77eb20208fed8fc199e0c9b1df08b\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/c65391dd9f0a47617e96e38bd27e277cbe1c40b0\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/f3783c415bf6d2ead3d7aa2c38802bbe10723646\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-47078\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-01T22:15:47.333\",\"lastModified\":\"2026-08-04T10:16:44.247\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/rxe: Clear all QP fields if creation failed\\n\\nrxe_qp_do_cleanup() relies on valid pointer values in QP for the properly\\ncreated ones, but in case rxe_qp_from_init() failed it was filled with\\ngarbage and caused tot the following error.\\n\\n refcount_t: underflow; use-after-free.\\n WARNING: CPU: 1 PID: 12560 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28\\n Modules linked in:\\n CPU: 1 PID: 12560 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0\\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\n RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28\\n Code: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 \u003c0f\u003e 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55\\n RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286\\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000\\n RDX: 0000000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67\\n RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000\\n R10: ffffffff815b4eae R11: 0000000000000000 R12: ffff8880322a4800\\n R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000\\n FS: 00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000\\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0\\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n Call Trace:\\n __refcount_sub_and_test include/linux/refcount.h:283 [inline]\\n __refcount_dec_and_test include/linux/refcount.h:315 [inline]\\n refcount_dec_and_test include/linux/refcount.h:333 [inline]\\n kref_put include/linux/kref.h:64 [inline]\\n rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805\\n execute_in_process_context+0x37/0x150 kernel/workqueue.c:3327\\n rxe_elem_release+0x9f/0x180 drivers/infiniband/sw/rxe/rxe_pool.c:391\\n kref_put include/linux/kref.h:65 [inline]\\n rxe_create_qp+0x2cd/0x310 drivers/infiniband/sw/rxe/rxe_verbs.c:425\\n _ib_create_qp drivers/infiniband/core/core_priv.h:331 [inline]\\n ib_create_named_qp+0x2ad/0x1370 drivers/infiniband/core/verbs.c:1231\\n ib_create_qp include/rdma/ib_verbs.h:3644 [inline]\\n create_mad_qp+0x177/0x2d0 drivers/infiniband/core/mad.c:2920\\n ib_mad_port_open drivers/infiniband/core/mad.c:3001 [inline]\\n ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092\\n add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:717\\n enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331\\n ib_register_device drivers/infiniband/core/device.c:1413 [inline]\\n ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c:1365\\n rxe_register_device+0x3d5/0x4a0 drivers/infiniband/sw/rxe/rxe_verbs.c:1147\\n rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247\\n rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:503\\n rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline]\\n rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250\\n nldev_newlink+0x30e/0x550 drivers/infiniband/core/nldev.c:1555\\n rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195\\n rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]\\n rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259\\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338\\n netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927\\n sock_sendmsg_nosec net/socket.c:654 [inline]\\n sock_sendmsg+0xcf/0x120 net/socket.c:674\\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350\\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2404\\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433\\n do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47\\n entry_SYSCALL_64_after_hwframe+0\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: RDMA/rxe: borra todos los campos QP si la creaci\u00f3n falla. rxe_qp_do_cleanup() se basa en valores de puntero v\u00e1lidos en QP para los creados correctamente, pero en caso de que rxe_qp_from_init() fallara, se llen\u00f3 con basura y provoc\u00f3 el siguiente error. refcount_t: desbordamiento insuficiente; Use After Free. ADVERTENCIA: CPU: 1 PID: 12560 en lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28 M\u00f3dulos vinculados en: CPU: 1 PID: 12560 Comm: syz-executor.4 No contaminado 5.12.0 -syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28 C\u00f3digo: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 \u0026lt;0f\u0026gt; 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 00000000000000000 RCX: 0000000000000000 RDX: 00 00000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67 RBP: 0000000000000003 R08: 00000000000000000 R09: 00000000000000000 R10: ffffffff815b4eae R 11: 0000000000000000 R12: ffff8880322a4800 R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000 FS: 00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS :0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0 DR0: 0000 000000000000 DR1 : 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas: __refcount_sub_and_test include/linux/refcount.h:283 [ en l\u00ednea] __refcount_dec_and_test include/linux/refcount.h:315 [en l\u00ednea] refcount_dec_and_test include/linux/refcount. h:333 [en l\u00ednea] kref_put include/linux/kref.h:64 [en l\u00ednea] rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805 ejecutar_in_process_context+0x37/0x150 kernel/workqueue.c:3327 rxe_elem_release +0x9f/0x180 controladores/infiniband/sw/rxe/rxe_pool.c:391 kref_put include/linux/kref.h:65 [en l\u00ednea] rxe_create_qp+0x2cd/0x310 controladores/infiniband/sw/rxe/rxe_verbs.c:425 controladores _ib_create_qp /infiniband/core/core_priv.h:331 [en l\u00ednea] ib_create_named_qp+0x2ad/0x1370 controladores/infiniband/core/verbs.c:1231 ib_create_qp include/rdma/ib_verbs.h:3644 [en l\u00ednea] create_mad_qp+0x177/0x2d0 controladores/infiniband /core/mad.c:2920 ib_mad_port_open drivers/infiniband/core/mad.c:3001 [en l\u00ednea] ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092 add_client_context+0x405/0x5e0 drivers/infiniband/core/ device.c:717 enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331 ib_register_device drivers/infiniband/core/device.c:1413 [en l\u00ednea] ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c :1365 rxe_register_device+0x3d5/0x4a0 controladores/infiniband/sw/rxe/rxe_verbs.c:1147 rxe_add+0x12fe/0x16d0 controladores/infiniband/sw/rxe/rxe.c:247 rxe_net_add+0x8c/0xe0 controladores/infiniband/sw/r xe /rxe_net.c:503 controladores rxe_newlink/infiniband/sw/rxe/rxe.c:269 [en l\u00ednea] controladores rxe_newlink+0xb7/0xe0/infiniband/sw/rxe/rxe.c:250 controladores nldev_newlink+0x30e/0x550/infiniband/ core/nldev.c:1555 rdma_nl_rcv_msg+0x36d/0x690 controladores/infiniband/core/netlink.c:195 rdma_nl_rcv_skb controladores/infiniband/core/netlink.c:239 [en l\u00ednea] rdma_nl_rcv+0x2ee/0x430 controladores/infiniband/core/netlink .c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [en l\u00ednea] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket. c:654 [en l\u00ednea] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b 0 red/toma .c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 Entry_SYSCALL_64_after_hwframe+0 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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T14:36:31+00:00",
"cve": "CVE-2021-47078",
"id": "CVE-2021-47078",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_affected": "90",
"product_status:known_not_affected": "108",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: RDMA/rxe: Clear all QP fields if creation failed",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47078.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T16:59:28Z",
"cve": "CVE-2021-47078",
"id": "CVE-2021-47078",
"initial_release_date": "2024-03-05T04:49:17Z",
"product_status:known_affected": "495",
"product_status:known_not_affected": "221",
"product_status:recommended": "236",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-47078",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47078.json",
"version": "55"
},
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{\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"03344e843ab6dd3b3f2cadfb65ed910590856c70\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\", \"lessThan\": \"67f29896fdc83298eed5a6576ff8f9873f709228\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/infiniband/sw/rxe/rxe_qp.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.9.270\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.234\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.192\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.122\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.40\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/infiniband/sw/rxe/rxe_qp.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c65391dd9f0a47617e96e38bd27e277cbe1c40b0\"}, {\"url\": \"https://git.kernel.org/stable/c/6a8086a42dfbf548a42bf2ae4faa291645c72c66\"}, {\"url\": \"https://git.kernel.org/stable/c/f3783c415bf6d2ead3d7aa2c38802bbe10723646\"}, {\"url\": \"https://git.kernel.org/stable/c/a62225d951d77eb20208fed8fc199e0c9b1df08b\"}, {\"url\": \"https://git.kernel.org/stable/c/2ee4d79c364914989c80de382c0b1a7259a7e4b3\"}, {\"url\": \"https://git.kernel.org/stable/c/03344e843ab6dd3b3f2cadfb65ed910590856c70\"}, {\"url\": \"https://git.kernel.org/stable/c/67f29896fdc83298eed5a6576ff8f9873f709228\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/rxe: Clear all QP fields if creation failed\\n\\nrxe_qp_do_cleanup() relies on valid pointer values in QP for the properly\\ncreated ones, but in case rxe_qp_from_init() failed it was filled with\\ngarbage and caused tot the following error.\\n\\n refcount_t: underflow; use-after-free.\\n WARNING: CPU: 1 PID: 12560 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28\\n Modules linked in:\\n CPU: 1 PID: 12560 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0\\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\n RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28\\n Code: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 \u003c0f\u003e 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55\\n RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286\\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000\\n RDX: 0000000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67\\n RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000\\n R10: ffffffff815b4eae R11: 0000000000000000 R12: ffff8880322a4800\\n R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000\\n FS: 00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000\\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0\\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n Call Trace:\\n __refcount_sub_and_test include/linux/refcount.h:283 [inline]\\n __refcount_dec_and_test include/linux/refcount.h:315 [inline]\\n refcount_dec_and_test include/linux/refcount.h:333 [inline]\\n kref_put include/linux/kref.h:64 [inline]\\n rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805\\n execute_in_process_context+0x37/0x150 kernel/workqueue.c:3327\\n rxe_elem_release+0x9f/0x180 drivers/infiniband/sw/rxe/rxe_pool.c:391\\n kref_put include/linux/kref.h:65 [inline]\\n rxe_create_qp+0x2cd/0x310 drivers/infiniband/sw/rxe/rxe_verbs.c:425\\n _ib_create_qp drivers/infiniband/core/core_priv.h:331 [inline]\\n ib_create_named_qp+0x2ad/0x1370 drivers/infiniband/core/verbs.c:1231\\n ib_create_qp include/rdma/ib_verbs.h:3644 [inline]\\n create_mad_qp+0x177/0x2d0 drivers/infiniband/core/mad.c:2920\\n ib_mad_port_open drivers/infiniband/core/mad.c:3001 [inline]\\n ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092\\n add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:717\\n enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331\\n ib_register_device drivers/infiniband/core/device.c:1413 [inline]\\n ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c:1365\\n rxe_register_device+0x3d5/0x4a0 drivers/infiniband/sw/rxe/rxe_verbs.c:1147\\n rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247\\n rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:503\\n rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline]\\n rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250\\n nldev_newlink+0x30e/0x550 drivers/infiniband/core/nldev.c:1555\\n rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195\\n rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]\\n rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259\\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338\\n netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927\\n sock_sendmsg_nosec net/socket.c:654 [inline]\\n sock_sendmsg+0xcf/0x120 net/socket.c:674\\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350\\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2404\\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433\\n do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47\\n entry_SYSCALL_64_after_hwframe+0\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.270\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.234\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.192\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.122\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.40\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.7\", \"versionStartIncluding\": \"4.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"4.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:45:51.708Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-47078\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:45:51.708Z\", \"dateReserved\": \"2024-02-29T22:33:44.297Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-01T21:15:14.679Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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